package com.csnf.demo1.service;

import com.csnf.demo1.pojo.Book;
import com.csnf.demo1.pojo.user;

import java.util.List;

public interface BookService {
    public List<Book> findAllBook();

    public Integer deleteById(Integer id);

    //4.8号晚自习作业
    public List<user> findAllUser();
}
